Tracker / CVE-2026-43091
CVE-2026-43091
High 7.8
In the Linux kernel, the following vulnerability has been resolved: xfrm: Wait for RCU readers during policy netns exit xfrm_policy_fini() frees the policy_bydst hash tables after flushing the policy work items and deleting all policies, but it does not wait for concurrent RCU readers to leave their read-side critical sections first. The policy_bydst tables are published via rcu_assign_pointer() and are looked up through rcu_dereference_check(), so netns teardown must also wait for an RCU grace period before freeing the table memory. Fix this by adding synchronize_rcu() before freeing the policy hash tables.
Affected products and versions
| linux | linux_kernel |
|---|---|
| linux | linux_kernel · 4.9 → 6.6.136 |
| linux | linux_kernel · 6.13 → 6.18.24 |
| linux | linux_kernel · 6.19 → 6.19.14 |
| linux | linux_kernel · 6.7 → 6.12.83 |
Analysis
This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.